Hollow in the production of bottle
blowing machine temperature should be how to pay attention to?
In the operation of the hollow
bottle blowing machine for processing, must pay attention to some temperature control to ensure that produce plastic bottles.
(
1)
Melting temperature TM: for crystalline polymer, refers to the macromolecular chain structure of 3 d remote orderly state into a disorderly stick the temperature of the flow pattern, also known as the melting point.
Is the lower limit of crystalline polymer processing temperature.
(
2)
Glass transition temperature TG: refers to the amorphous polymer (
Including an amorphous part of the crystalline polymer)
From the glassy state to the high elastic state or by the transition temperature of the latter to the former.
Is freedom of the amorphous macromolecule polymer chain segment motion, the lowest temperature is products operating temperature limit.>
Aluminum plate spot welding machine,
3)
Don't flow temperature: flow does not occur under the pressure of a certain maximum temperature.
Is to add a certain amount of plastic in the cylinder at the top of the mold of the capillary rheometer, heated to a certain temperature, the constant view of 10 min after applying 50 mpa constant pressure, if the material is not issue from the mouth mould, after unloading material difficult temperature 10 degrees, insulation 10 min after applying the same size constant pressure, so to continue until the melt issue from the mouth mould, will be cut out this temperature 10 degrees is the material flow temperature.
(
4)
Flow temperature TF: refers to the amorphous polymer by the temperature of the high elastic state into a viscous flow state.
Is the lower limit of the amorphous plastics processing temperature.
(
5)
Decomposition temperature of TD: refers to in the viscous flow of polymer when the temperature rises further, will be exacerbated the degradation of molecular chains, to make the temperature of the polymer molecular chain obvious degradation for decomposition temperature.
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